· Touch gives us a contact to feel objects.
· Touch is also called the tactile sense too!
· Touch gives us a sense of cold, hot and pressure.
· Touch has many kinds of tactile corpuscles throughout the skin and some deeper into the tissues that can feel pressure.
· Every bit of your skin is use for the touch sense.
· Touch is all over your body.
· Nerves send pressure, cold and hot signals to the brain.
· The brain sends signals back to the muscles to react. Some places like our hands have more senses than others.
· There are about 100 touch receptors in all your fingertips.
· Touch is in the skin. On the top layer is hot and cold and the middle and bottom is pressure.
· Rattlesnakes use their skin to sense when other animals are near.
· The sense of touch also gives us information about temperature, itching, pressure and pain.
· Each part of our body has a part in the brain that gives information about things we touch.
· Cats, dogs and many other animals have whiskers that sense when they touch things or when things are near.
· Whiskers also help animals to find their way in the dark.
· Here is something neat that I learnt, every square centimeter on our body has 200 pressure receptors, 15 cold and 1 hot.
· Pain receptors are probably the most important because they warn us about danger.
Content The sense of touch is very complicated and it is strongly related
to the skin that covers our entire body. Even the hairs on our body feed information
to our nerve endings, just like whiskers do on a cat. Nerves that are all over
our body send a message to the spinal cord and to the brain telling the brain
that it is touching something. This message is then registered in special areas
in the cortex in the brain where we decide what to do with the information.
Each part of our body has its own place in the brain where the information
is sent to and dealt with (see the picture below).
Here is how the sense of touch works when you take a drink of really hot chocolate. First of all when you pick it up the touch sensors in our hand senses that it is hot. This message is sent along nerves in the hand, up the arm to the spinal cord and then the brain. Our brain then says, “be careful, this is hot!” When we go to take a sip, our brain is already making us think about blowing on it or being very careful. Once you take a sip, our touch sensors in our mouth and on our tongue, send information to the brain that it is hot.